package exam.security;

import cn.hutool.json.JSONUtil;
import exam.utils.JwtUtils;
import exam.utils.Msg;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;


@Component
public class LoginSuccessHandler implements AuthenticationSuccessHandler {

    @Autowired
    JwtUtils jwtUtils;

    @Override
    public void onAuthenticationSuccess(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Authentication authentication) throws IOException, ServletException {
        httpServletResponse.setContentType("application/json;charset=UTF-8");

        ServletOutputStream outputStream = httpServletResponse.getOutputStream();

        //生成jwt，并放置在请求头中
        String jwt = jwtUtils.generateToken(authentication.getName());
        httpServletResponse.setHeader(jwtUtils.getHeader(),jwt);

//        System.out.println(jwt);

        Msg msg = Msg.success();

        outputStream.write(JSONUtil.toJsonStr(msg).getBytes(StandardCharsets.UTF_8));
        outputStream.flush();
        outputStream.close();
    }
}
